<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>
    <div class="app"></div>
    <script>
        var http = "你的名字";
        // jquery会自动识别字符串中的标签
        var p = `<p>${http}</p>`;
        $(".app").append(p)
    </script>
</body>
</html>